Just found this website and bookmarked it straight away! :D I'm a matte painter as well but I'm more of a 3D type person. I'm going through Dusso's matte painting dvds now as well to improve my painting though ;)
Anyway, I've written a tutorial about camera mapping, how to actually turn a matte painting into a 3D scene. It uses Cinema 4D but can be easily applied to any other 3d software. Here's the link:
http://www.3dfluff.com/cameramapping...mappingtut.htm
Janine